Sometimes you need a little coffee to focus and sometimes you need a zoom lens to focus. Well the Fotodiox Thermo Lens Cup won’t help you take pictures better unless you require a hot drink. But it will keep 16 ounces of your beverage hot (or cold) in a package that looks just like a Nikon 24-70mm F2.8G Lens but is made of insulated stainless steel instead of fancy optics and such. Now you can focus.